Anti-polluting incinerator

ABSTRACT

Trash is burned in a sealed firebox supplied with air under pressure. Smoke from the firebox is exhausted through a water tank via j-shape tubes whose longer ends extend upwardly from the top of the firebox and whose shorter open ends terminate in water in the tank.

United States Patent 11 1 Blair Nov. 26, 1974 [5 ANTI-POLLUTING INCINERATOR 3,572,264 3 1971 Mercer 110/119 x Inventor: Lesley W. Blair 605 Third e 3,756,171 9/1973 DeBord, 110/119 X N.W., Pocahontas, Iowa 50574 FOREIGN PATENTS OR APPLICATIONS [22] Filed? Aug. 27, 1973 1,582,618 8/1969 France 55/256 [211 Appl' 391823 Primary Examinerl(enneth W. Sprague Attorney, Agent, or Firm-Littlepag & Quaintance [52] US. Cl 110/8 R, 110/10, 110/119,

' 55/256 [57] ABSTRACT [51] Int. Cl. F23g 5/00 58 Field of Search 110/8 R, 10, 119; 55/256 Trash burned a Sealed under pressure. Smoke from the firebox is exhausted [56] References Cited through a water tank v1a -shape tubes whose longer ends extend upwardly from the top of the firebox and 2 070 578 :TATES PATENTS 56 X whose shorter open ends terminate in water in the owman 55 2 t k 3,520,113 7/1970 Stokes 110/119 X an 3,530,805 9/1970 Bowman 110/119 X 5 Claims, 3 Drawing Figures ANTI-POLLUTING INCINERATOR FIELD OF INVENTION Stoves and Furnaces, Domestic-refuse burners.

OBJECTS Heretofore, various smoke-abatement devices have been utilized in connection with incinerators. Oftentimes the smoke passes through a water spray; and, while this is somewhat effective for removing carbon particles from the smoke, it entails the use of a recirculating pump for the sprayed water, and substantial loss of water through evaporation.

The object of this invention is to provide a sealed firebox in which the trash is burned, and to which combustion air is forced by low-pressure air pump. The forced air not only assures complete and rapid burning of the trash, but also it forces the smoke into the water in a tank spaced above the firebox. After filtering through the water, the smoke, then cleansed of carbon particles, exhausts via a conventional hooded stack.

These and other objects will be apparent from the following specification and drawings, in which:

FIG. I is a vertical cross-section through the incinerator;

FIG. 2 is a cross-section along the line 22 of FIG. I; and,

FIG. 3 is a cross-section along the line 3-3 of FIG. 1.

Referring now to the drawings, in which like reference numerals denote similar elements, the antipollution incinerator 2 has a closed firebox 4 having side and bottom walls 4a and 4b and a top wall 34 described hereinafter. Supported in spaced relationship above the firebox is a water tank 6 having side and top walls 6a and 6b and a bottom wall 38 also described hereinafter. Extending upwardly from the firebox are j-shape tubes 8 whose downwardly directed open ends 36 terminate short of the bottom wall 38 of tank 6. A stack 12 extends upwardly from the top wall 60 of tank 6 and, as

will be apparent from the detailed description hereinafof carbon or other particles and certain of the gases are absorbed by bubbling up through the water in the tank.

More specifically, in the side wall 4a firebox 4 there is mounted an infeed chute 14 which is closed by a sealed door 16 hinged as at 18 and clamped thereto as at 20. Spaced above bottom wall 4b of firebox 4 is a grate support 22 suitably supported as by fillets 24.

Various types of perforate grates, not shown, may be disposed upon grate support 22. Beneath grate support 22 is a sealable clean-out door 26 and an air pump 28 is connected to firebox 4 by an air tube 30 which enters the firebox below grate support 22 so that combustion air under pressure will be distributed throughout the mass of material to be burned on the grate.

The longer ends 32 of j-tubes 8 are secured to the top wall 34 of firebox 4 around openings 35. The shorter downwardly directed ends 36 of the j-shape tubes terminate above the bottom wall 38 of tank 6. It should be noted that the longer ends of the j-shape tubes engage through openings 39 in the bottom wall 38 of tank 6 and that the bottom wall 38 of the water tank is spaced above the top wall 34 of the firebox so as to reduce the transfer of heat from the firebox to the water tank and thereby reduce the amount of water lost from the tank by vaporization. On one side of tank 6 there is an open ended sight glass 40, one end 42 of which is swivelled to a nipple 44 adjacent the bottom of tank 6. Ordinarily the sight glass is disposed upwardly as shown in FIG. 1 to display the level of water in the tank, but it may be swivelled downwardly in order to drain the water from the tank. A suitable hose coupling, not shown, may be provided for filling tank 6 with water to a level not exceeding the upwardly directed open end of sight glass 40.

In operation, trash to be incinerated is introduced into firebox 4 via the then opened door 16 so that the trash rests on the grate mounted on grate support 22. The tank 6 is filled with water to about the level shown in FIG. 1, the trash is ignited, door 16 is clamped shut, and air pump 28 is started so as to force compustion air into the firebox beneath the grate. Smoke from the firebox, which is maintained at pressure above the atmosphere by the compressed air from pump 28, is forced upwardly through the longer ends 32 of j tubes 8 and thence downwardly out the downwardly directed shorter ends 36 of j tubes into the water 10 in the tank. This smoke thence bubbles up through the water, whereby it is cleansed, and the cleansed smoke is exhausted via stack 12. Since the bights 46 of the j-shape tubes are disposed above the level of the water, no water can pass via the j tubes 8 from the tank 6 through firebox 4. When the trash has been thoroughly incinerated, the fine ash therefrom will pass through the grate into the bottom of the firebox from which it may be removed via clean-out door 26. Obviously, other sealable clean-out means may be provided for removing unburnable components of the trash from the firebox.

I claim:

1. An anti-pollution incinerator comprising,

a closed firebox,

a water tank supported above the firebox, with the bottom of the water tank spaced above the firebox, whereby to reduce the transfer of heat from the firebox to the tank,

curved tube means extending upwardly from the firebox and having a downwardly directed open end terminating above the bottom of the water tank,

means for exhausting combustion gases from the top of the tank, and

means for forcing airinto the firebox, whereby to supply combustion air to material in the firebox and to force gaseous products of combustion via the curved tube means into water in said tank.

2. The combination claimed in claim 1, said firebox having a grate support above the bottom thereof, the means for forcing air into the firebox including an air tube leading into the firebox below the grate support.

3. In the combination claimed in claim 2, said firebox having a sealable infeed opening above the grate support and a sealable cleanoutopening below the grate support, and sealable door means for closing said openmgs.

4. The combination claimed in claim 1, and a sight glass comprising an elongate open-ended tube disposed adjacent the side of the tank and having one end swivelled to the tank side adjacentthe bottom thereof, the other end of said tube being normally directed upwardly for displaying the level of the water in said tank the longer ends of said j-shape tubes extending upwardly from the top of the firebox and being secured around openings therein,

said longer ends of said j-shape tubes engaging through openings in the bottom of the tank, the shorter ends of the j-shape tubes terminating short of the bottom of the tank,

means for exhausting gas from the top of the tank,

and means for forcing combustion air into the firebox. 

1. An anti-pollution incinerator comprising, a closed firebox, a water tank supported above the firebox, with the bottom of the water tank spaced above the firebox, whereby to reduce the transfer of heat from the firebox to the tank, curved tube means extending upwardly from the firebox and having a downwardly directed open end terminating above the bottom of the water tank, means for exhausting combustion gases from the top of the tank, and means for forcing air into the firebox, whereby to supply combustion air to material in the firebox and to force gaseous products of combustion via the curved tube means into water in said tank.
 2. The combination claimed in claim 1, said firebox having a grate support above the bottom thereof, the means for forcing air into the firebox including an air tube leading into the firebox below the grate support.
 3. In the combination claimed in claim 2, said firebox having a sealable infeed opening above the grate support and a sealable clean-out opening below the grate support, and sealable door means for closing said openings.
 4. The combination claimed in claim 1, and a sight glass comprising an elongate open-ended tube disposed adjacent the side of the tank and having one end swivelled to the tank side adjacent the bottom thereof, the other end of said tube being normally directed upwardly for displaying the level of the water in said tank and being swivellable downwardly for draining water from said tank.
 5. An anti-polluting incinerator, comprising a closed firebox having top, bottom and side walls, a water tank disposed above the firebox and having top, bottom and side walls, the bottom wall of the water tank being spaced above the top wall of the tank, a plurality of substantially j-shape tubes each having relatively longer and shorter oppositely divided open ends, the longer ends of said j-shape tubes extending upwardly from the top of the firebox and being secured around openings therein, said longer ends of said j-shape tubes engaging through openings in the boTtom of the tank, the shorter ends of the j-shape tubes terminating short of the bottom of the tank, means for exhausting gas from the top of the tank, and means for forcing combustion air into the firebox. 